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Prothena (PRTA) Institutional Ownership

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$5.07 -0.03 (-0.59%)
Closing price 06/12/2025 04:00 PM Eastern
Extended Trading
$4.97 -0.10 (-1.97%)
As of 08:19 AM Eastern
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Institutional Ownership Changes (13F Filings) for Prothena (NASDAQ:PRTA)

Current
Institutional Ownership
Percentage
97.08%
Number of
Institutional Buyers
(last 12 months)
74
Total
Institutional Inflows
(last 12 months)
$108.72M
Number of
Institutional Sellers
(last 12 months)
42
Total
Institutional Outflows
(last 12 months)
$44.49M
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PRTA Institutional Buying and Selling by Quarter

Prothena Major Shareholders & Ownership History

Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
5/23/2025 Siren L.L.C.1,283,555$15.88M0.9%+16.7%2.385%
5/16/2025 Goldman Sachs Group Inc.510,462$6.32M0.0%-8.3%0.948%
5/16/2025 Jacobs Levy Equity Management Inc.18,553$230K0.0%N/A0.034%
5/15/2025 Birchview Capital LP332,974$4.12M3.5%+9.3%0.619%
5/15/2025 Palo Alto Investors LP1,659,734$20.54M3.9%-4.5%3.083%
5/15/2025 PDT Partners LLC150,316$1.86M0.1%+18.2%0.279%
5/15/2025 Armistice Capital LLC2,196,000$27.18M0.4%-1.8%4.080%
5/15/2025 Siren L.L.C.1,283,555$15.88M0.9%+16.7%2.385%
5/14/2025 Rafferty Asset Management LLC43,978$544K0.0%-43.4%0.082%
5/14/2025 Price T Rowe Associates Inc. MD3,455,856$42.77M0.0%-6.2%6.420%
5/14/2025 Hsbc Holdings PLC13,088$160K0.0%-45.9%0.024%
5/14/2025 Wellington Management Group LLP5,199,528$64.34M0.0%+1.3%9.660%
5/13/2025 Cresset Asset Management LLC13,125$162K0.0%-32.5%0.024%
5/13/2025 American Century Companies Inc.34,836$431K0.0%+14.6%0.065%
5/12/2025 Nuveen LLC149,961$1.86M0.0%N/A0.279%
5/12/2025 Invesco Ltd.37,638$466K0.0%-12.2%0.070%
5/9/2025 Chicago Partners Investment Group LLC14,512$180K0.0%+29.6%0.027%
5/9/2025 Charles Schwab Investment Management Inc.319,607$3.96M0.0%-2.3%0.594%
5/9/2025 DCF Advisers LLC195,000$2.41M1.2%+88.4%0.362%
5/8/2025 Federated Hermes Inc.546,255$6.76M0.0%-26.8%1.015%
5/7/2025 Purkiss Capital Advisors LLC21,629$268K0.2%+101.6%0.040%
5/7/2025 TD Asset Management Inc62,694$776K0.0%-3.1%0.116%
5/6/2025 Pinnacle Associates Ltd.100,259$1.24M0.0%-2.7%0.186%
5/6/2025 KLP Kapitalforvaltning AS6,700$83K0.0%-48.1%0.012%
4/30/2025 Alps Advisors Inc.37,956$470K0.0%-12.8%0.071%
4/29/2025 Bank of New York Mellon Corp146,009$1.81M0.0%-2.8%0.271%
4/24/2025 HighMark Wealth Management LLC2,018$25K0.0%-81.9%0.004%
4/22/2025 Cambridge Investment Research Advisors Inc.10,164$126K0.0%N/A0.019%
4/21/2025 Duncan Williams Asset Management LLC88,339$1.09M0.4%+27.7%0.164%
4/15/2025 SG Americas Securities LLC72,559$898K0.0%+92.9%0.135%
4/10/2025 Hennion & Walsh Asset Management Inc.77,637$961K0.0%+48.5%0.144%
4/8/2025 Rhumbline Advisers66,079$818K0.0%-1.5%0.123%
4/7/2025 GAMMA Investing LLC6,002$74K0.0%+4,626.0%0.011%
3/24/2025 Wellington Management Group LLP5,130,876$71.06M0.0%+22.8%9.532%
2/17/2025 UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC381,508$5.28M0.0%-27.6%0.709%
2/17/2025 Two Sigma Investments LP38,394$532K0.0%+265.4%0.071%
2/17/2025 Rafferty Asset Management LLC77,672$1.08M0.0%+24.8%0.144%
2/17/2025 ProShare Advisors LLC14,524$201K0.0%+29.5%0.027%
2/17/2025 Prosight Management LP418,122$5.79M1.6%-13.5%0.777%
2/17/2025 Man Group plc77,430$1.07M0.0%+90.7%0.144%
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2/17/2025 Millennium Management LLC123,005$1.70M0.0%+9.3%0.229%
2/17/2025 MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.27,269$381K0.0%+6.0%0.051%
2/17/2025 Deutsche Bank AG95,970$1.33M0.0%+195.7%0.178%
2/17/2025 Cresset Asset Management LLC19,434$269K0.0%-20.4%0.036%
2/17/2025 Cary Street Partners Financial LLC12,500$173K0.0%N/A0.023%
2/17/2025 Balyasny Asset Management L.P.38,021$527K0.0%N/A0.071%
2/17/2025 Bank of America Corp DE119,007$1.65M0.0%+45.0%0.221%
2/17/2025 BNP Paribas Financial Markets97,383$1.35M0.0%+74.4%0.181%
2/14/2025 Boxer Capital Management LLC690,000$9.56M0.8%N/A1.282%
2/14/2025 PDT Partners LLC127,203$1.76M0.2%+15.0%0.236%
2/14/2025 Northern Trust Corp404,496$5.60M0.0%+8.5%0.752%
2/14/2025 The Manufacturers Life Insurance Company70,184$972K0.0%-18.5%0.130%
2/14/2025 Birchview Capital LP304,574$4.22M3.4%+45.3%0.566%
2/14/2025 Susquehanna Fundamental Investments LLC80,677$1.12M0.0%N/A0.150%
2/14/2025 Virtus ETF Advisers LLC5,148$71K0.0%+19.3%0.010%
2/14/2025 Voya Investment Management LLC12,829$178K0.0%-8.1%0.024%
2/14/2025 RBF Capital LLC29,200$404K0.0%-35.6%0.054%
2/14/2025 Price T Rowe Associates Inc. MD3,685,708$51.05M0.0%-3.6%6.850%
2/14/2025 Hsbc Holdings PLC24,179$323K0.0%+60.4%0.045%
2/14/2025 Rock Springs Capital Management LP644,601$8.93M0.3%+3.1%1.198%
2/14/2025 Tower Research Capital LLC TRC16,826$233K0.0%+208.3%0.031%
2/14/2025 Dimensional Fund Advisors LP864,833$11.98M0.0%+1.3%1.607%
2/13/2025 XTX Topco Ltd18,665$259K0.0%+19.9%0.035%
2/13/2025 Mariner LLC343,917$4.76M0.0%+6.4%0.639%
2/13/2025 Barclays PLC105,338$1.46M0.0%+10.6%0.196%
2/13/2025 Raymond James Financial Inc.13,111$182K0.0%N/A0.024%
2/13/2025 Renaissance Technologies LLC201,900$2.80M0.0%+10.4%0.375%
2/13/2025 Legal & General Group Plc41,405$573K0.0%-3.7%0.077%
2/13/2025 Invesco Ltd.42,846$593K0.0%+4.0%0.080%
2/13/2025 FMR LLC8,071,309$111.79M0.0%+0.1%15.000%
2/13/2025 Federated Hermes Inc.746,177$10.34M0.0%+84.3%1.387%
2/13/2025 Finepoint Capital LP657,071$9.10M0.6%+51.6%1.221%
2/13/2025 Wells Fargo & Company MN52,823$732K0.0%-20.2%0.098%
2/12/2025 Massachusetts Financial Services Co. MA44,815$621K0.0%N/A0.083%
2/12/2025 Headlands Technologies LLC7,330$102K0.0%+196.5%0.014%
2/12/2025 Geode Capital Management LLC964,308$13.36M0.0%+0.1%1.792%
2/12/2025 Franklin Resources Inc.19,687$273K0.0%N/A0.037%
2/12/2025 Wellington Management Group LLP5,130,876$71.06M0.0%+22.8%9.535%
2/12/2025 Norges Bank57,454$796K0.0%N/A0.107%
2/12/2025 JPMorgan Chase & Co.387,350$5.37M0.0%+93.7%0.720%
2/11/2025 Corebridge Financial Inc.21,140$293K0.0%-7.0%0.039%
2/11/2025 Vanguard Group Inc.1,403,838$19.44M0.0%+11.5%2.609%
2/11/2025 KLP Kapitalforvaltning AS12,900$179K0.0%N/A0.024%
2/11/2025 American Century Companies Inc.30,399$421K0.0%+66.1%0.056%
2/11/2025 DCF Advisers LLC103,500$1.43M0.7%-3.7%0.192%
2/11/2025 Teacher Retirement System of Texas10,434$145K0.0%N/A0.019%
2/10/2025 Thrivent Financial for Lutherans38,626$535K0.0%-18.7%0.072%
2/10/2025 Connor Clark & Lunn Investment Management Ltd.91,840$1.27M0.0%-25.0%0.171%
2/7/2025 Amundi1,954$28K0.0%-85.7%0.004%
2/7/2025 Foundation Wealth Management LLC19,471$270K0.2%N/A0.036%
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2/6/2025 Raymond James Financial Inc.13,111$182K0.0%N/A0.024%
2/6/2025 Charles Schwab Investment Management Inc.327,151$4.53M0.0%+0.7%0.608%
2/5/2025 Purkiss Capital Advisors LLC10,729$149K0.1%N/A0.020%
2/4/2025 Bank of New York Mellon Corp150,238$2.08M0.0%+14.9%0.279%
2/3/2025 Handelsbanken Fonder AB20,900$289K0.0%+35.7%0.039%
1/31/2025 HighMark Wealth Management LLC11,168$155K0.1%-32.3%0.021%
1/30/2025 Rhumbline Advisers67,115$930K0.0%+1.8%0.125%
1/28/2025 Focused Wealth Management Inc32,129$445K0.1%N/A0.060%
1/24/2025 China Universal Asset Management Co. Ltd.11,409$158K0.0%+10.3%0.021%
1/24/2025 Chicago Partners Investment Group LLC11,197$159K0.0%N/A0.021%
(Data available from 1/1/2016 forward)

PRTA Institutional Ownership - Frequently Asked Questions

Who are the largest shareholders of PRTA shares?

During the previous two years, 154 institutional investors and hedge funds held shares of Prothena. The most heavily invested institutionals were FMR LLC ($111.79M), Wellington Management Group LLP ($64.34M), Price T Rowe Associates Inc. MD ($42.77M), State Street Corp ($28.02M), Armistice Capital LLC ($27.18M), Artal Group S.A. ($24.80M), and Boxer Capital LLC ($24.17M).Learn more on PRTA's institutional investors.

What percentage of Prothena stock is owned by institutional investors?

97.08% of Prothena stock is owned by institutional investors. Learn more on PRTA's institutional investor holdings.

Which institutional investors have been buying Prothena stock?

Of the 126 institutional investors that purchased Prothena stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: Wellington Management Group LLP ($2.96M), Armistice Capital LLC ($742K), Boxer Capital Management LLC ($690K), Artal Group S.A. ($500K), UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC ($483.67K), Price T Rowe Associates Inc. MD ($417.34K), and Bank of New York Mellon Corp ($389.17K).

How much institutional buying is happening at Prothena?

Institutional investors have bought a total of 11,280,418 shares in the last 24 months. This purchase volume represents approximately $288.14M in transactions.

Which Prothena major shareholders have been selling company stock?

Of the 76 institutional investors that sold Prothena stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Janus Henderson Group PLC ($1.73M), First Light Asset Management LLC ($1.05M), PFM Health Sciences LP ($646.83K), Price T Rowe Associates Inc. MD ($402.16K), Prosight Management LP ($392.44K), Dimensional Fund Advisors LP ($318.90K), and SG Americas Securities LLC ($265.47K).

How much institutional selling is happening at Prothena?

Institutional investors have sold a total of 7,327,792 shares in the last 24 months. This volume of shares sold represents approximately $217.92M in transactions.



This page (NASDAQ:PRTA) was last updated on 6/13/2025 by MarketBeat.com Staff
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